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Glossary Actuator An actuator is the electromechanical mechanism that transfers the RF contacts from one position to another upon DC command. Arc Suppression Diode A diode is connected in parallel with the coil. This diode limits the “reverse EMF spike” generated when the coil de-energizes to 0.7 volts. The diode cathode is connected to the positive side of the coil and the anode is connected to the negative side. Date Code All switches are marked with either a unique serial number or a date code. Date codes are in accordance with MIL-STD-1285 Paragraph 5.2.5 and consist of four digits. The fi rst two digits defi ne the year and the last two digits defi ne the week of the year (YYWW). Thus, 0532 identifi es switches that passed through fi nal inspection during the 32nd week of 2005. Latching A latching switch remains in the selected position whether or not voltage is maintained. This can be accomplished with either a magnetic or mechanical latching mechanism. Indicator Indicators tell the system which position the switch is in. Other names for indicators are telemetry contacts or tellback circuit. Indicators are usually a set of internally mounted DC contacts linked to the actuator. They can be wired to digital input lines, status lights, or interlocks. Unless otherwise specifi ed, the maximum indicator contact rating is 30 Vdc, 50 mA, or 1.5 Watts into a resistive load. Isolation Isolation is the measure of the power level at the output connector of an unconnected RF channel as referenced to the power at the input connector. It is specifi ed in dB below the input power level. SPDT Switch A single-pole double-throw switch has one input and two output ports. Switching Time Switching time is the total interval beginning with the arrival of the leading edge of the command pulse at the switch DC input and ending with the completion of the switch transfer, including contact bounce. It consists of three parts: (1) inductive delay in the coil, (2) transfer time of the physical movement of the contacts, and (3) the bounce time of the RF contacts. Performance Parameters vs Frequency Generally speaking, the RF performance of coaxial switches is frequency dependent. With increasing frequency, VSWR and insertion loss increase while isolation decreases. All data sheets specify these three parameters as “worst case” at the highest operating frequency. If the switch is to be used over a narrow frequency band, better performance can be achieved. Actuator Current vs Temperature The resistance of the actuator coil varies as a function of temperature. There is an inverse relationship between the operating temperature of the switch and the actuator drive current. For switches operating at 28 VDC, the approximate actuator drive current at temperature, T, can be calculated using the equation: I T = Where: I A [1 + .00385 (T-20)] I T = Actuator current at temperature, T I A = Room temperature actuator current – see data sheet T = Temperature of interest in °C Magnetic Sensitivity An electro-mechanical switch can be sensitive to ferrous materials and external magnetic fi elds. Neighboring ferrous materials should be permitted no closer than 0.5 inches and adjacent external magnetic fi elds should be limited to a fl ux density of less than 5 Gauss. Transfer Switch The transfer switch is essentially a modifi ed double-pole-double-throw (DPDT) device. However, a true DPDT switch is a six port device that contains two totally independent transmission paths. In a transfer switch two transmission paths are provided but they are not totally independent as illustrated in Figure 2. Examples of applications of the transfer switch are as follows: Two Transmitters to Either of Two Antennas Two microwave transmitters can be connected to either of two alternate antennas as shown in Figure 3. COAX SWITCHES Circuit Insertion A complete microwave circuit or circuit element can be inserted into a transmission line by using a transfer switch as shown in Figure 4. In Figure 4 1 Circuit 3 2 4 Out In the event that the 1-3 shorting of the microwave circuit is undesirable, this leg can be left out. 1 2 DPDT 3 4 5 6 1 2 Transfer 3 4 Pos. 1 connection Pos. 2 connection Transfer Switch A four-port switch consisting of two independent pairs of RF paths. These pairs are actuated simultaneously. This actuation is similar to that of a double-pole double-throw switch. See application notes for typical usage. XMTR XMTR Figure 3 Page 56 SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE © 2013 Teledyne Relays
Coil A wire assembly wound around an insulating bobbin or spool. Contact arrangement The combination of contacts that make up the entire relay switching structure. Contact bounce Internally caused intermittent and undesired opening of closed contacts, or closing of open contacts. Contact bounce time The interval between fi rst make of the contact until the uncontrolled opening and closing of the contact ceases. Contact chatter The momentary opening of a closed contact due to external shock or vibration. Contact force The force exerted by a movable contact against its matching stationary contact when the contacts are closed. Contact gap The minimum distance between a moving contact and its matching stationary contact when the contacts are open. Contact Stabilization Time The interval between the fi rst closure of a contact until the contacts reach and maintain a static contact resistance state. Contact weld The fusing of contacts, resulting in their failure to open. Contacts The current-carrying parts of a relay that open or close electrical circuits. Cycle, relay One opening and one closure of a contact set. One cycle consists of two operations. Dropout voltage, specified As the voltage on an energized relay is decreased, the voltage at or above which all relay contacts must return to their deenergized positions. Not applicable to latching relays. Electromechanical relay A relay in which the motion of the contacts are dependent upon the magnetic attraction or repulsion of an armature to or from a pole face. The magnetic force is generated by a coil which may or may not incorporate suppression and/or polarity reversal protection methods. Hermetically sealed relay A relay contained within an enclosure that is sealed by welding to insure a low rate of gas leakage. Inspection lot A grouping of relays based upon their similarity in manufacturing process characteristics and screening requirements submitted for inspection at one time. Latching (bistable) relay A two-position relay whose contacts transfer only as a result of coil energization of a particular coil, remain in that position with no coil energization, and transfer to the alternate position only as a result of coil energization of the other coil. Miss Failure to establish the intended contact conditions. Glossary Neutral position An anomalous state in latching (bistable) relays normally produced by insuffi cient coil signal or simultaneous pulsing of set and reset coils. Analogous to “don’t care” condition in electronic latches. This condition is not harmful to the relay. Normal mounting means A method of mounting whereby an intended test is performed on a relay and the fi xture(s) employed adequately supports the relay and neither attenuates nor amplifi es the intended condition. Normally closed contact Those contacts that are closed with the relay de-energized. Not applicable to latching relays. Normally open contact Those contacts that are open with the relay de-energized. Not applicable to latching relays. Operate time The interval between the application of an input signal and fi rst closing of a normally open contact. Bounce time is not included. Operation, relay One opening or closure of a contact set. One relay operation is one-half of a cycle. Output The circuit within a relay which controls an external load circuit and is changed from a conducting to a non-conducting state (and vice versa) by the relay operation. Pickup voltage, specified As the current or voltage on a de-energized relay is increased, the voltage at or below which all contacts must achieve their energized positions. Polarized relay A relay, the operation of which is primarily dependent upon the direction (polarity) of the energizing current(s) and the resultant magnetic fl ux. Production lot A grouping of relays released for production as a single lot. Rated coil voltage The coil voltage at which the relay is designed to operate and meet all specifi ed electrical, mechanical and environmental requirements. Relay An electrically controlled switch. Release time The interval between the removal of an input signal and fi rst closing of a normally closed contact. Bounce time is not included. Not applicable to latching relays. Reset Voltage The voltage required to return the contacts of a latching relay from a set position to a specifi ed initial condition. There is no universally defi ned reset position. Saturation The condition attained in a magnetic material when an increase in magnetizing (coil) current produces no appreciable increase in fl ux. Set Voltage The voltage required to change the contact position of a latching relay from a specifi ed initial condition. There is no universally defi ned set position. Supply voltage The voltage source that supplies power to drive the relay coil. © 2013 Teledyne Coax Switches (800) 351-7368 • www.teledynerelays.com www.teledynecoax.com • +44 (0) 1236 453124 • www.teledyne-europe.com Page 57
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COAX SWITCHES
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COAX SWITCHES www.teledynecoax.com
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Table of Contents Coaxial SPDT Swit
Page 7 and 8:
Product Introduction COAX SWITCHES
Page 9 and 10: Product Overview COAX SWITCHES In a
Page 11 and 12: Product Standards COAX SWITCHES The
Page 13 and 14: Product Capabilities COAX SWITCHES
Page 15 and 16: Series HR412/ HRS412 DC up to 1 GHz
Page 17 and 18: Series HR412V/ HR412V DC up to 1 GH
Page 19 and 20: Series HR412V/ HR412V DC up to 1 GH
Page 21 and 22: Series HR412K/ HRS412K DC up to 1 G
Page 27 and 28: Series HR422K/ HRS422K DC up to 1 G
Page 29 and 30: Series HR255/HR257 DC up to 3 GHz M
Page 35 and 36: DETAILED SUMMARY OF STANDARD SCREEN
Page 37 and 38: Lot Acceptance Tests Level 2 Custom
Page 39 and 40: COAX SWITCHES Series H-33S DC up to
Page 41 and 42: COAX SWITCHES Series H-32N DC up to
Page 43 and 44: COAX SWITCHES Series H-37S DC up to
Page 45 and 46: COAX SWITCHES Series H-47N DC up to
Page 47 and 48: COAX SWITCHES Series H-28S T-Switch
Page 49 and 50: COAX SWITCHES Series H-28 T-Switch
Page 51 and 52: COAX SWITCHES Series H-28 T-Switch
Page 53 and 54: COAX SWITCHES DETAILED SUMMARY OF S
Page 55 and 56: Switch Blocks COAX SWITCHES Teledyn
Page 57 and 58: Options M4 SPACER PAD The M4 spacer
Page 59: And Capabilities COAX SWITCHES PREC
Page 63 and 64: Did you know... Teledyne Coax Switc
Page 65 and 66: Did you know... Teledyne Relays off
Page 67 and 68: Relays and COAX Spectrum Teledyne R
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